656565111041 has 16 divisors (see below), whose sum is σ = 785175794688. Its totient is φ = 537155712000.

The previous prime is 656565111017. The next prime is 656565111049. The reversal of 656565111041 is 140111565656.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 656565111041 - 2¹⁰ = 656565110017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 656565111041.

It is not an unprimeable number, because it can be changed into a prime (656565111049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20707760 + ... + 20739441.

It is an arithmetic number, because the mean of its divisors is an integer number (49073487168).

Almost surely, 2^656565111041 is an apocalyptic number.

It is an amenable number.

656565111041 is a deficient number, since it is larger than the sum of its proper divisors (128610683647).

656565111041 is a wasteful number, since it uses less digits than its factorization.

656565111041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41447312.

The product of its (nonzero) digits is 108000, while the sum is 41.

Adding to 656565111041 its reverse (140111565656), we get a palindrome (796676676697).

The spelling of 656565111041 in words is "six hundred fifty-six billion, five hundred sixty-five million, one hundred eleven thousand, forty-one".